155831012 has 12 divisors (see below), whose sum is σ = 276774960. Its totient is φ = 76752456.

The previous prime is 155830973. The next prime is 155831023. The reversal of 155831012 is 210138551.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290462 + ... + 290997.

It is an arithmetic number, because the mean of its divisors is an integer number (23064580).

Almost surely, 2^155831012 is an apocalyptic number.

It is an amenable number.

155831012 is a deficient number, since it is larger than the sum of its proper divisors (120943948).

155831012 is a wasteful number, since it uses less digits than its factorization.

155831012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581530 (or 581528 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 155831012 is about 12483.2292296505. The cubic root of 155831012 is about 538.1268109930.

Adding to 155831012 its reverse (210138551), we get a palindrome (365969563).

The spelling of 155831012 in words is "one hundred fifty-five million, eight hundred thirty-one thousand, twelve".